Evaporator.



PATENTED NOV. 24, 1903.

H. J. LYMAN.

EVAPORATOR.

Patented November 24, 1903.

Parent @lrricn.

HENRY J. LYMAN, OF COREY, PENNSYLVANIA.

EVAPORATO R.

SPECIFICATION forming part of Letters Patent No. 744,867, dated November24:, 1908. Application filed May 5, 1903. Serial No. 155,738. (No model)T0 on whom it may concern.-

Be it known that I, HENRY J. LYMAN, a citizen of the United States,residing at Corry, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Evaporator-s, of whichthe following is a specification.

This invention provides means'for quickly reducing sap to any requiredconsistency by driving off the excess of Water by evaporation throughthe agency of artificial heat.

The invention consists, essentially, of two side pans, til-shapedtubular bars connecting said side pans and forming a fuel-grate, astraight pipe connecting the side pans for return circulation,anddeflectors located within the side pans over the ends of the U-shapedtubular bars to prevent overflow of the sap from any cause.

The invention also consists of the novel structural features, whichhereinafter will be more particularly set forth and claimed, andillustrated in the accompanying drawings, in which Figure 1 is aperspective view of an evaporator embodying the invention. Fig.2 is atransverse section of the end portion having the fuel-grate.

Corresponding and like parts are referred to in the followingdescription and indicated in both views of the drawings by the samereference characters.

The invention consists, essentially, of side pans 1 and 2, U-shapedtubular bars 3, deflectors 4, and return-pipe 5. These parts, arrangedsubstantially as shown, are adapted to be applied to an evaporator ofany structural type, make, or design.

The U-shaped tubular bars 3 are disposed in parallel relation and areconnected at their ends with the respective pans 1 and 2 and constitutea fuel-grate for supporting the fire, by means of which the evaporatingprocess is efiected. The side pans 1 and 2 are oblong and are placed soas to extend over the fuelgrate, the bars of which connect with theirbottom adjacent to the outer side, so as to leave a maximum amount ofthe pans overhanging the fire to receive the full benefit of the heatrising therefrom. The deflectors 4: are plates curved upwardintermediate of their longitudinal edges and arranged within pan 2 byway of pipe 5.

the lower portion of pans 1 and 2, so as to extend over the extremitiesof the tubular bars 3 and prevent spurting upward of the sap during theboiling and evaporating process in the event of a sudden accumulation ofsteam at one or more points or from other cause. The tubular bars 3 inaddition to forming a fuel-grate serve to establish circulation betweenpans 1 and 2 and to provide an extended surface for action of the heatin boiling the sap or syrup. The return-pipe 5 connects pans l and 2near their upper forward ends and may be of any diameter to insurecirculation which is necessary in the treating of the sap to increaseits density and consistency.

,A shallow pan 6 is interposed between side pans 1 and 2 and extendsdirectly above the fuel-grate and receives the sap from one of the sidepans after it has acquired the proper density. In the rear ofevaporating-pan 6 is located pan 7, same extending over the hotair space8, located in the rear of the fuel grate and constituting, in effect,the combustion-chamber. Smoke-pipe 9 communicates with smoke-space 10 inthe rear of hot-air space of combustion-chamber 8. Pans 6 and 7 may beof any construction, such as commonly provided in appliances of thecharacter relating to the present invention.

In the operation of the invention'sap from a tank or other source ofsupplyis run into one of the side tanks, as 1, and fills the tubularfuel-bars 3 and flows into pan 2. The heat derived from the fire builtupon the grate causes the sap to boil and to rise into pan 2, the sapbeing returned to pan 1. from After the sap has acquired the properconsistency or densityit is discharged from pan 2 into pan 6 throughoutlet 11, and from pan 6 the sap overflows into pan 7, from which it isremoved in any determinate way to be filled into cans or otherreceptacles for market.

While it is preferred to have the tubular fuel-bars 3 connect with theside pans, as shown, yet they may communicate with the pans at any pointbelow the level of the sap. The cool sap entering pan 1 from tank 12gravitates into pipes 3 and becoming heated rises into pan 2 and passestherefrom into pan 6 through outlet 11, maintaining a prac ICO and areturn-pipe connecting said side pans and extending over the fuel-space,substantially as set forth.

2. In an evaporator,the combination of side pans, tubular barsconnecting said pans, and deflectors arranged within the pans above theextremities of the tubular bars, substantially as specified.

3. In an evaporator, oblong side pans, U- shaped tubular bars connectedwith the bottom of the pans near their outer sides, de-

flectors within the pans above the ends of the tubular bars, and areturn-pipe connecting said side pans, substantially as described.

4. In an evaporator, the combination of oblong side pans located abovethe fuel-grate and overhanging same, tubular bars of approximately Uform connected at their ends with the bottom of the side pans near theirouter sides and constituting fuel-supports, a return-pipe connecting theside pans, an evaporating-pan located above the fuel-grate and betweensaid side pans, and an evaporatingpan in the rear of the fuel-grate andthe series of pans located above the said fuel-grate, substantially asset forth.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY J. LYMAN. [L. s.]

\Vitnesses:

W. S. THOUNHURST, S. E. KINCAID.

